Automatic wick stop for oil burners



Oct. 23, 1923.

y L. S. CHADWICK AUTOMATIC WICK STOP FOR'OIL BURNERS Original Filed March 5. 1921 1 VIII Patmedci. 23, 1923 LEE si cminw-Ion, ons-irennnnnsenrs, entre, assit-filon no manY ennvn-LimniMET-,nn

rnonuc'rs contreien, or onnunmnn, eine, A conromirronionomo.

i/iU'ltfJr/.timic1 Wiel; snor non oir, e-trislinns Agpncatipnfiiea Marche', 1921,' semina. 449,342. Renewed June e, 1923; fsenarnb. 555,346'.

To all fui/m t may concern.'

Be Ait known that I, Lnn S. C-niowroi, a citizen orn theV {flnitedI States,I residing at L Slfiaker Heights village, in the county of* o Cuyahoga and'State ot' Ohio, have invented a certain newv and useful: improvement in Automatic l/Vick'Stops for @il Burners, oi"

which the following is a full, clear, and eX- act description, reference being had to the 10 accompanying drawings.

My present invention, likeV those consti'- tuting the subjects matter oi my former' applications SerialV Nos. 448,108 and i4/Soul,

filed FebruaryV 26,1921, has todo with inilprovements in oil burnerspot thev class employing wicks, and it relates more particularly to means for restricting the wick against being raised' above a predetermined elevation.

The objects of the invention are to pro,- vide va thoroughly reliable andx automatic wickf'stop whichv is positif'e in its action; not likely to get out oi order; is durable; simple of construction and con'iparatively when incorporated in `burners 'of the tubular type, 1s concealed fromview.

To, these endsY my invention may be delined in general yterms asf consisting of'- ar brake member' adapted to directly engage the wick; a'meinberadapted to be engaged by the top of-thewi'ekf andi?displacedtherebyl as the Vwick is elevatedfgv operative connections between said member andthe brake;

the wckf after it is' engaged by the brake.4 The' essential point of 'difference ofmy present invention from the inventions disclosed in my aforesaid applications is tha-t in the presentl case th'e'st'op device or brake member contacts with the wick, whereas, in the others, the stop mechanism co-acts; with a part of the wick raising vmeans to arrest the movementV oftheV wrok. f f

W'ith referenceV to the accompanying drawing wherein like-characters designate:`v

corresponding parts throughout lthe several'Y v1ews, F1g-. 111sv Va central` vertical section through ag b'urnelv incorporating' one" for1n off mymvention; Fig. 21's a sectional detaillonthe line 2 2 of`Fig-:- l; Fig; a viewsimilar-to Fig.v l or"Y 'a modification; ywhile-F t! is a section-aglidetailA on the correspondingly numbered line of Fig'; l- 56 inexpensive of manufacture, and which,r

and' means aiiording-a limited movement ot" In general respects, the burners shown? inf Fesl' wdl'ale the Seme andi ari'ef, the, tubular'type, the innepjandoutei; wicltubes being designated l and; 2, respectively, and being joined at their lower end s `by an annular wall 3, thereby to enclose aspacedwherein a wick is'adapted4 tobe raised and lowered by means of` a wick-raising spindle 6, havingl the usual star wlleelsor p inionsv thatv meshwith a Vwick carrier 8" applied tfo the Y lower portion'offthe wick. The wic l sp a ce. 65 et derives its supply of' fuel from' a pipe 1Q," whereon the burnerV ismounted throu h common form of connection between;y` the.. pipe and burner (not shown), A flame spreader l2 is shown in dotted' lines as sup'- ported in operative relationg to. the upper end of' the wick. I'nasinuch as the foregoing iS a' Common and Well-known Constructions further and more' detaileddescription there! of is: deemed unnecessary; v

In each modification, theinne wiclctubef l is provided with an oil tightcasing, 15:, the interiorA whereofl communicates' withl the I wick space 4L through slotgs'iii the i 1` 1 11er"wijclgV tube. The casings l54 accommodate the wick stop'mech'anism which shafllnow describe. Y

In the form offthe inventionillustrated in Figs. ,l and 2, a lever20 is journaledupon'aj pnQl that ssupportedlby Mldbetween the side walls offithe casing-15mm'lever'tl calj-y I Tying a roller 22- 21 its. 11 .Pier end'iferen" gagementr with' the top,r ofthe 'w-ick", 4 and' af roller 24' at' its lower endf for engagement with the' rear sideof'vf'a brake'member 25.,A The brake: member isj connected, through links 26, withV a bar 27 to Lform parallelogram, and the pins 28jthro'ugh' whichfthe links 26 are cojnnectedf-toY the bar 2? carry; rollers 29 thati traverse the innery vertic.al Vwall of thecasi'ng l5, thereby to restrictthe. assembly toaY` verticalk course of ino'veinent.v

In this form of the invention,- when the' wickv is elevated and" engagesand?"displaces ber 2 5 vtoward the wick and-into engagement" -witlra Vroughened orinely corrugated strip 3 0, `fwhich may hev anextensi'oniof, the wick? carrier 8j, and wherew-itlrlthe wick isjpr'e-4 yerably provided-to protect itY a'gainstjbeingj 1105 mutilated' by the' brake VI nemberg'As thei wick*continues--'to`rise, it-willfcarrywith itL the brake* member-' and partsm connected;

" thereto until'ithenpper roller "219 engages an` adjustable stepfBl-inl-the orin-of a screw T150 es Y fab

three-ded through a member supported by the casing 15. l

Upon the return of the parts to normal position, the movable assembly will come to rest (through the lower roller 29) on an abutment 32 carried by the casing Should the weight of the brake member 25 be insuflicient to 'dislodge it from the wick, a spring 33 may be included for this purpose which isshown as having one of its ends connectedto the brake member and its other end anchored to the casing l5.

In order that the wick may beremove-c from the burner, as for the purpose of replacing` it by a new wick, it is necessary to temporarily render inoperative the wick stop mechanism. I have shown 'as means for accomplishing thisy a cam lever 35 that is pivoted at 36 to the casing 15 and which has a part cooperating with `the pivot pin 21 of the lever 20 where the .pin projects through slots 37 in the casing for holding the pin in the forward end of the slot with the roller 22 of lever 2O in the path of the wick. The .cam lever is preferably oomposed of two side plates which straddle the casing l5 and engage the opposite ends of pin 2l, the upper ends of the side plates being connected through a part 33 whereby -the lever may be manipulated. When the cam lever is swung inwardly into ineffective position, the pin 21 may'move toward the rear of the slots 37 to allow the roller 22 to fall away asthe wick passes without actuating the brake member 25.

Referring now to the form of the invention illustrated in Figs. 3 and 4, 40 is an angle lever which carries a roller 41 at its upper end and that normally reposes within the upper end of the wick space 4 in the path of the wick 5.

The opposite end of the lever is'pivoted at 43 to the upper end ofa brake member 44 and the lower end of the brake member is connected through a link 45 with the corresponding end of a bar 46. The angle of the lever is pivotally connected to the upper end of this bar. rlhe lower branch of the angle lever 40, andthe parts 44, 45, and 46 constitute a parallelogram. The pins 4?, which connect the ends of the bar 46 to the angle lever 40 and link are restricted normally to a vertical course of movement so that the brake member 44 is retained at all times in parallelism with the wick by the ends of the lower `pin being confined within vertical grooves 48 thatrare formed in the sides of the casing 15, and the ends of the upper pin being retaine for movement within the vertical branches of L-shaped slots 49 of the casing.

In'operation, when the spindle 6 is rotated in a direction to elevate the wick, the upper end of the wick will engage the roller 41, displacing it inwardly and rocking the angle lever 40 in a direction to throw the brake memb r 44 into engagement with the wick, or more properly, with the protecting` strip 30 thereof. The wick will now continue torise, carrying all parts of the stop mechanism with it until the pins 47 engage and are stopped by the upper ends of the grooves and slots 49. rllhis will result in locking the wick against further upward movement after ithas attained an elevation representing the maximum height of the wick. Y

To remove the wick from the burner in the present form of the invention., a cam lever 51, similar to the equivalent part 35 of the former embodiment may be swung on its pivot 52 away from the upper pin 47, allowing` 'the pin to fall back into the hori- Zontal branch of the L-shaped slot 49 when the roller 41 isengaged and moved by the wick, thereby to render the stop mechanism inoperative.

Thus it will be seen that my invention provides means for automatically stopping the wick at a predetermined elevation, which mechanism is positive of operation and requires no adji'istment or attention of any kind, the same being self-adjusting to compensate for the variable length of the wick due to its being cleaned from time to time.

For the purposes of claims, the term wick may be regarded as inclusive or elusive of the protecting strips 30 and 50.

Having thus described my invention, what I claim is:

1. In a burner of the character set forth involving a wick guide and means for raising the wick, aI brake member for engagement with the wick, a member arranged to be engagedand moved by the wick when the latter is elevated, and operative connections between said members whereby the former is actuated by the latter.

2. In a burner of the character set forth involving a wick guide and `means for rais ing the wick, a brake member for engagement with the wick, a member arranged to be engaged and moved by the wick when the latter is elevated, and operative connections between said members whereby the former is actuated by the latter, the brake member being capable of a limited movement bodily withthe wick.

3. In a burner of the character set fortl involving a wick guide and means for raising the wick, a brake member for engagement with the wick, a member arranged to be engaged and moved by the wick when the latter is elevated, operative connections between said members whereby the former is actuated by the latter, the brake member being capable of aA limited movement bodily with theV wick, and an adjustable stop for limiting the movement of the brake member.

` ,involving a Wick guide and means forrais.

' brake member substantially in. parallel rela-.7,` tion to the Wick and permitting a limited` ing the Wick, a brake member for engagement with "the Wick, means' for sustaining the bodily movement of the brake member with 'the Wick, and means moved by the Wick when member With the Wick;

6. ln a burner of the character set forth involving a wick-guidel and means. for rais-` ing the Wick, a bar supported by the burner structure Jfor movement in a plane parallel to that of the Wick, a brake memberfor engagement Withthe Wick, connections. between the brake member and bar, a member are the Wick is elevated for engagingthe brake 4ranged to be engaged and swung laterallyY` by the Wick when the wick is elevated, andl operative connections` between the last men tioned member and the brake member, as and for the purpose specified.

7. In a burner of the characterv set forth involving a Wick guide andimeans fori raising the Wick, a bar supported by the burner structure for movement in a. pla-ne substan-v tially parallel to the plane of the Wick, abrake memberfor engagement with then/ick, links connecting the-,brake member and bar, and means arrangedto be engaged and moved by thewvick when thev latter is elevated for moving the brekemember intoI engagement With the Wick, thel assemblyy comprising the brake member, bar, and links being bodily movable with the Wick, and an adjustable stop for `limiting the movementof said assembly.

S. In a burner of the character set forth involving' a Wick guide and means for raising the Wick, a bar supported bythe burner structure for movement in a plane substan-v tially parallel to the plane of the Wick, a brake member for engagement With the Wick, links having substantially correspondingly spaced points pivotally connected to equally spaced points of the brake'member and bar, means arranged to be engaged and moved by the Wick When the latter is elevated 'for moving the brake member into engagement with the Wick, the assembly comprising the brake member, bar, and links being bodily Y movable With the Wick, and a. stop for limiting the movement of said assembly. e

9. In a burner of the character set forth involving Ia Wick guide and mean-s forrais- .ing the Wick, a bar snppor'tedby the burnerr structurel for movement ina plane parallel-f' .to that of the Wick, brake member oren-l y `A -laced' points of they Y brake-member andba-r, one of said elements: Y

being arranged/to b efsivung laterally'bythe Wick when the Wick-is. elevated therebyY- to move the brakelmeinber- Vinto engagement.

with the Wick, the assembly comprising the brake mem-ber,y bar, and-I elements being capable of a limited moemeirt bodily with the wick. f j

10.v In a burnerot the character set forth involving inner and outer wicktubesbesof tween WlliCh a cylindrical'wick isadapted tvo bev guided, means for 'raismgl and lowering the Wick, a casingwithin the inner Wiel: tube the interior whereof communicates through a slotjin'the inner Wick tube- With thewiclr I saacebra-ke membcriada `)ted to engage 7 b t? thetvvickl through said slot, a bar Within Vthe casing, g elements having correspoiidinglfy spaced points pivotally connected'to equally spaced points offt-he brake member andbar', the pivotal connection between; thev bar 'and said elements involving; pins, andthe side Walls of the casing having grooves lwherein the pinsy are Aton-fined to a limited movement l in ai plane parallelztof that of the Wick, oneV of theaioresaid, ele-ments having an extension, and a roller carried by said extensio-nf` in a position to be engaged andmoved by the Wickwhen the latter Vis elevated, thereby to, swing' the bra-ke member into engagement with the Wick. l

11,111 'abn-rne-r oifthecliaracter setiortlav involving innen and outer Wick; tubes bve-iA tween which acylindrical', Wick: is-'adapted to be guided, and means for raisingand., loweringv the; Wick, a casing-1 extending Wardlyfrom the innerl Wclftube, the interior,-

'whereof` communicates withV the Wick space through aslot in theinnerl Wicktube, a brake member arranged to,= enga-ge .the Wick through said slot, a bar Within the casing, links having correspondingly spaced vpoints pivotally connected to equally spaced points of the brake member and bar, anti-friction devices through Awhich the assembly comprising the links, bar, and brake member bear upon'the inner Wall of the' casing, said l Wall beingv parallel to the Wick tubes, a lever pivotaly supportedvvvithin each casing andv ing engaging the brake 'membeig and a stop for limitingtheupvvard movementrof the assembly comprising the bralcemember,

bar, 'and links.

,having a roller at its upper end ivhich'isV k12. In a burner ot the character set forth, involving a'wick guide and means for raising the wick, wick stop mechanism comprising a brake member for engagement with the wick, a member arranged to be engaged and moved by the wick when the latter is elevated, operative connections between said members whereby the former is actuated by the latter, and means tor rendering said mechanism inoperative so that the wick may be removedtrom the burner.

13. In a burner ot the character set Jorth involving a wick guide and means for raising` the wick, a brake member tor engagement with the wick, an actuator arrangedv to be engaged and moved by the wick and having operative connection with the brake vmember, the actuator when so moved and restricted to a given pathl of movement serving to present the brake member to the wick,

and shiftable means which when in normal. position restricts the actuator to said given path of movement, said means when shifted from normal position permitting the actuator to move without presenting the brake member to the wick.

14. In a burner of the character set forth involving a wick and wick raising means, wick stop mechanism operating independently of the wick raising means and which is normally inoperative, and means arranged to be engaged by the wick when the latter is elevated for rendering the stop mechanism operative. s

15. In a burner of the character set forth involving a wick and wick raising means, wick stop mechanism operating independently of the wick raising means and normally reposing in inoperative position, and means arranged to be engaged by the wick 'when the latter is elevated for moving the stop mechanism to operative position.

16. In a burner of the character set forth involving a wick and wick raising means, wick stop mechanism operating independently of the wick raising means and which is normally inoperative, means arranged` to be engaged by the wick when the latter is elevated tor rendering the stop mechanism operative, and means Ior throwing the stop mechanism out otv commission so that the an element arranged to be engaged by the wick when the latter is elevated for rendering` the stop mechanism operative, said element being shlt'table out ot the path ot the lwick wherle'by the stop mechanism may be lel't inoperative so that the wick may be removed from the burner.

1S. In a burner of the character' set iorth, in combination with the wick, mechanism involving both a stop arranged to engage the wick thereby to arrest its upward movement and an element adapted to be engaged and moved by the wick for renderingthe stop effective.

19. In a burner ot' the character set forth, lthe combination with the wick, ot wick stop mechanism involving an element arranged to be engaged and moved by the burned pon tion of the wick, and a member arranged to be ioved by said element into contact wit another portion of the wick thereby to arrest upward movement of the wick.

20. In a burner of the character set torth` in combination with the wick, wick stop mechanism involving parts respectively engaged by the wick to set the mechanism in operation, and engaging the wick to arrest the latters upward movement.

21. In a burner of the character set forth, in combination with the wick, normally inoperative wick stop mechanism rendered effective by the movement of the wick and engaging the wick to arrest the latters upward movement.

In testimony whereof, I hereunto aniX my si gnature. Y

LEE S. CHADVVICK. 

